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 Encounter -> Report Power using VCD  

Last post Wed, Feb 27 2013 9:09 AM by Terry2000. 2 replies.
Started by Terry2000 04 Feb 2013 07:13 AM. Topic has 2 replies and 1441 views
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  • Mon, Feb 4 2013 7:13 AM

    • Terry2000
    • Not Ranked
    • Joined on Tue, Dec 18 2012
    • Posts 11
    • Points 275
    Encounter -> Report Power using VCD Reply

    Hello,

    I've generating a Power Report using a VCD file for activity:

    1. Exported netlist from encounter.

    2. Used this netlist in ncsim and generated VCD file 

    3. Read in the activity file into encounter, this is the cmd generated from the menu: 

    read_activity_file -report_missing_nets true -format VCD -scope u_bon5000_toplevel -start {} -end {} -block {} ../ATPG/RESULTS/bon5000_test.vcd

      Filename (activity)                    : ../ATPG/RESULTS/bon5000_test.vcd
      Names in file that matched to design   : 1557/1924
      Annotation coverage for this file      : 1557/2080 = 74.8558%

    INFO (POWER-2168): Current Memory Usage : 1,150Mb bytes at 2013-Feb-04 14:38:56(2013-Feb-04 14:38:56 GMT)

      367 nets were found in the VCD file(s) but were not in
      the design.  These nets are listed in the log file eps.logv .

      Total annotation coverage for all files of type VCD: 1557/2080 = 74.8558%
      Percent of VCD annotated nets with zero toggles: 198/2080 = 9.51923%

    4. I am not getting 100% annotation of nets. I've used the -report_missing_nets to try and debug the unannotated nets however no debug information is written either the the display and there is no sign of an eps.logv file anywhere in the database.

     Any idea's how to debug the missing annotated nets ????

    • Post Points: 20
  • Wed, Feb 27 2013 8:16 AM

    • Kari
    • Top 10 Contributor
    • Joined on Tue, Jul 15 2008
    • Cary, NC
    • Posts 693
    • Points 14,395
    Re: Encounter -> Report Power using VCD Reply
    make sure the scope is correct. if you remove "u_bon5000_toplevel" from the names in the VCD, do they now match your design?
    • Post Points: 20
  • Wed, Feb 27 2013 9:09 AM

    • Terry2000
    • Not Ranked
    • Joined on Tue, Dec 18 2012
    • Posts 11
    • Points 275
    Re: Encounter -> Report Power using VCD Reply
    Hello Kari,

    Thanks for your reply, I managed to debug the issue a few days back.

    The magic command to see what nets were not being annotated is:

    dump_unannotated_nets -file <filename> -type annotationType vcd

    It was then very esy to debug the issue, it was the lack of any logfile that was my issue debugging the problem.

    The problem was indeed an issue with the scope statement in my VCD file.  Seem to recall the scope instance from a VCD generated from an ET testbench needed a slight tweek when being used in EDI.

    Cheers

    Terry
    • Post Points: 5
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Started by Terry2000 at 04 Feb 2013 07:13 AM. Topic has 2 replies.